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title: Domestic Water Booster Pump Systems
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When to use: Packaged domestic (potable) water pressure-booster pump systems that raise municipal or building supply pressure to serve upper floors, high-demand fixtures, and flushometer groups in commercial, institutional, multistory residential, and industrial buildings. Covers variable-speed (VFD) multiplex packaged systems built on vertical multistage centrifugal pumps; duplex and triplex lead/lag/standby staging and N+1 redundancy; constant-discharge-pressure and proportional (zone) control; flow and boosted-pressure sizing from the system curve and the available suction pressure; the hydropneumatic (bladder) tank that prevents short-cycling and supports no-flow shutdown; low-suction-pressure cutoff and pressure-sustaining protection of the city main; lead-free wetted materials under the federal Reduce Lead in Drinking Water Act and NSF/ANSI/CAN 61 and 372; the skid, manifolds, valves, controls, and BAS interface; disinfection and testing.
− Not intended for: Fire pumps (see [[syncs/fire-pumps]]); sump, sewage, and ejector pumps (see [[syncs/sump-and-sewage-pumps]]); HVAC hydronic circulating pumps (see [[syncs/hvac-pumps]]); private well pumps and well pressure systems; gravity rooftop-tank and elevated-storage pressure systems; and pressure-reducing stations on a supply that already has adequate pressure (see [[syncs/domestic-water-piping]]).
+ Not intended for: Fire pumps (see [[sync/fire-pumps]]); sump, sewage, and ejector pumps (see [[sync/sump-and-sewage-pumps]]); HVAC hydronic circulating pumps (see [[sync/hvac-pumps]]); private well pumps and well pressure systems; gravity rooftop-tank and elevated-storage pressure systems; and pressure-reducing stations on a supply that already has adequate pressure (see [[sync/domestic-water-piping]]).
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## The pump selection follows directly from the design flow, the boosted pressure, and the available suction pressure, so those three quantities are established first and the remaining requirements follow from them. {note}
−## Coordinate the suction supply, the backflow assembly, and the discharge connection point with [[syncs/domestic-water-piping]] and [[syncs/backflow-prevention]], and coordinate the equipment location, housekeeping pad, and service clearances with [[drawing: the plumbing floor plans and the mechanical room layout]]. {note}
+## Coordinate the suction supply, the backflow assembly, and the discharge connection point with [[sync/domestic-water-piping]] and [[sync/backflow-prevention]], and coordinate the equipment location, housekeeping pad, and service clearances with [[drawing: the plumbing floor plans and the mechanical room layout]]. {note}
# Referenced Standards {toc}
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- Lead-free compliance documentation certifying all wetted components to NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372
- Low-suction-pressure protection data, including the low-suction cutoff device, its setpoint, and any pressure-sustaining valve provided to protect the public main
−- Vibration isolation and seismic restraint data for the skid, coordinated with [[syncs/vibration-isolation-and-seismic-restraint]]
+- Vibration isolation and seismic restraint data for the skid, coordinated with [[sync/vibration-isolation-and-seismic-restraint]]
- Electrical and control wiring diagram showing pumps, VFDs, sensors, low-suction cutoff, alarms, the field power connection, and the BAS connection
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## Maximum System Pressure {toc}
−### The system discharge pressure at no-flow or at maximum suction pressure shall not exceed 80 psi at any fixture, and where it would, a pressure-reducing station shall be provided downstream per [[syncs/domestic-water-piping]].
+### The system discharge pressure at no-flow or at maximum suction pressure shall not exceed 80 psi at any fixture, and where it would, a pressure-reducing station shall be provided downstream per [[sync/domestic-water-piping]].
### Sustained static pressure above 80 psi at a fixture is prohibited by the adopted plumbing code and accelerates wear of valves, seals, and fixture trim; the combination of maximum suction pressure plus full boost shall be checked against this limit. {note}
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## The booster skid shall be isolated from the structure to limit the transmission of pump and motor vibration into the building, and shall be restrained against seismic forces where the building code requires it. {note}
−### The skid shall be mounted on vibration isolators selected for the operating weight and speed of the equipment, coordinated with [[syncs/vibration-isolation-and-seismic-restraint]].
+### The skid shall be mounted on vibration isolators selected for the operating weight and speed of the equipment, coordinated with [[sync/vibration-isolation-and-seismic-restraint]].
### Flexible connectors shall be provided at the suction and discharge connections to the building piping so that pump vibration and minor movement are not transmitted into the rigid distribution piping.
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### The Contractor shall set the booster skid level on the housekeeping pad and connect the suction and discharge to the building domestic water piping through the flexible connectors and isolation valves.
−### The suction connection shall be made downstream of the building service backflow protection and any required water meter, coordinated with [[syncs/backflow-prevention]] and [[syncs/domestic-water-piping]].
+### The suction connection shall be made downstream of the building service backflow protection and any required water meter, coordinated with [[sync/backflow-prevention]] and [[sync/domestic-water-piping]].
### Service clearances around the skid shall be maintained so that any pump, the control panel, and the tank can be serviced and removed without disturbing the others.
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## The spare parts list and the recommended replacement interval for wear items shall be included in the operation and maintenance manual.